. >> reporter: the fbi open an investigation as officials try to sort out whether this was a protest that got out of hand or an organized terrorist attack. danielle nottingham, cbs news, the state department. >> three americans who were injured in the benghazi attack are being treated at a u.s. military hospital in germany. receipt a mans of ambassador stevens -- the remains of ambassador stevens and the three others killed will arrive back in this country tomorrow. >>> we are learning more about the attack itself. every room in that american consulate was torched, vandalized and looted. the compound on a residential street in the port city of benghazi was not heavily fortified. those attackers bombed the guard house and took over the main building and completely destroyed it and threw pieces of furniture into the pool. that raid lasted 4 1/2 hours, but somehow none of the attackers were caught or killed. >>> on the campaign trail today both side were in the battleground state of virginia. we begin with mitt romney in fairfax coun where the conversation quickly turned to libya. >> mi